1974 (D) Lincoln Memorial Cent - CU-1C-1974D-07 Cud

Description

The seventh documented cud variety for the 1974 Denver Lincoln Memorial cent, CU-1C-1974D-07 is cataloged in the Cuds on Coins system and represents yet another die rim failure from this exceptionally high-mintage production year. The cud documented here resulted when a section of die steel at the rim fatigued to the point of complete separation, leaving an unrestricted cavity that allowed planchet metal to extrude during subsequent strikes. Without the "R" suffix in its catalog number, CU-1C-1974D-07 is classified as an obverse cud, appearing on the portrait side of the coin. Each die's rim has its own unique microstructure, hardness profile, and history of thermal cycling from repeated strikes, all of which influence where and when a fatigue crack will nucleate and propagate to failure. CU-1C-1974D-07's specific break geometry and clock-position provide the diagnostics needed to distinguish it from the other twelve entries in the 1974-D cud catalog.

Cross References

• CU-1C-1974D-07

External References